Match-board structure for molds



Patented Mar. 4, 1924.

UNITED STATES PATENT JOHN C. WICKHAM, F SPRINGFIELD, OHIO, ASSIG'NOR TO THE WIGKHAM PIANO PLATE COMPANY, OF SPRINGFIELD, OHIO, A GOBPORATION OF OHIO.

MATCH-BOARD STRUCTURE FOR MOLDS.

Application filed September 14, 1921.

To all whom it may concern Be it known that I, JOHN C. WIOKHAM, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Match-Board Structures for Molds, of which the following is a specification.

My invention relates to improvements in molding apparatus, and particularly to a match board structure for use in connection with such apparatus.

The object of my invention is to provide a match board of simple and light Construc- 1 tion by which the pattern parts may be supported during the process of making the molds; a further and more specific object being to provide a supporting frame of a rigid but comparatively light character to which the parts which carry or form the patterns are rigidly connected.

In the accompanying drawings Fig. 1 is a plan view of the supportinr frame of the structure.

26 Fig. 2 is a plan view of a completed structure with parts broken away.

Fig. 3 is a view of one edge of the structure.

Referring to the drawings, 1 represents a 30 frame of skeleton character cast from metal,

the bars forming this frame being sufficiently heavy to lend extreme rigidity to the same, but the open or skeleton form of the frame serving to lend lightness to the same consistent with the necessary strength required. To each side of this frame is attached a slab 2 and 3, preferably of wood, the wood employed being preferably of a character to be easily carved. The slabs not Serial No. 500,579.

only find a support upon the side edges of the metallic frame, but upon the connecting bars thereof as well, so that said slabs will be rigidly supported substantially throughout their lengths and breadths.

The respective slabs have the pattern parts attached thereto or formed thereon. In the present case, I have shown in Fig. 2 a portion of a piano plate pattern 4: attached to the board 2 to form one side of the casting, in this case the front and main body of a piano plate, while the board 3 is carved out and built up on its outer side to form the pattern for the rear side of the plate.

By this construction, it will be seen that a match board is provided of a rigid character which will serve to prevent any warping or bending of the pattern parts, particularly patterns for castings of large dimensions but comparatively light weight such as the piano plate pattern shown.

Having thus described my invention, I claim 1. In a structure of the character described, a rigid, metallic, reticulated frame, a wooden slab rigidly attached to one of the faces of said frame whereby it will be supported thereon, and metallic pattern parts secured to the outer face of said slab.

2. In a match board structure, a frame formed of rigid material, a central body portion with continuous net work of bars extending throughout the central portion of said frame, a slab attached to said frame bearing against the net work of the frame, and pattern parts carried by said slab.

In testimony whereof, I have hereunto set my hand this 12th day of September, 1921.

JOHN C. WIGKHAM. 

